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Yubune Tephra Takaya, 1963

• Type locality: Higashiyubune, Iga city, Mie prefecture
• Tephra
• Pliocene

• Lithofacies: Vitreous volcanic ash
• Sedimentary structures: Parallel foliation

• Thickness: 60 - 150 cm
• Host: Wada Member, Kaigake Member

• Distribution: Higashiyubune - Tsuge, Iga city, Mie pref.; Kitasunakawa river, Hino city, Gamo county, Shiga pref.

• Nakano et al. (2003) Geology of the Minakuchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 83p. (in Japanese with English abstract 3p.)
• Kawabe et al. (1996) Geology of the Ueno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 99p. (in Japanese with English abstract 5p.)
• Miyamura et al. (1981) Geology of the Kameyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 9p.)